[PATCH v3 4/7] ARM: davinci: net: davinci_emac: add OF support
Heiko Schocher
hs at denx.de
Mon Mar 5 06:10:01 EST 2012
add of support for the davinci_emac driver.
Signed-off-by: Heiko Schocher <hs at denx.de>
Cc: davinci-linux-open-source at linux.davincidsp.com
Cc: linux-arm-kernel at lists.infradead.org
Cc: devicetree-discuss at lists.ozlabs.org
Cc: netdev at vger.kernel.org
Cc: Grant Likely <grant.likely at secretlab.ca>
Cc: Sekhar Nori <nsekhar at ti.com>
Cc: Wolfgang Denk <wd at denx.de>
Cc: Anatoly Sivov <mm05 at mail.ru>
---
- changes for v2:
- add comment from Anatoly Sivov
- fix typo in davinci_emac.txt
- add comment from Grant Likely:
- add prefix "ti,davinci-" to davinci specific property names
- remove version property
- use compatible name "ti,davinci-dm6460-emac"
- use devm_kzalloc()
- use of_match_ptr()
- document all new properties
- remove of_address_to_resource() and do not overwrite
resource table
- whitespace fixes
- remove hw_ram_addr as it is not used in current
board code
- no changes for v3
.../bindings/arm/davinci/davinci_emac.txt | 43 +++++++++
drivers/net/ethernet/ti/davinci_emac.c | 94 +++++++++++++++++++-
2 files changed, 136 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/arm/davinci/davinci_emac.txt
diff --git a/Documentation/devicetree/bindings/arm/davinci/davinci_emac.txt b/Documentation/devicetree/bindings/arm/davinci/davinci_emac.txt
new file mode 100644
index 0000000..a7b0911
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/davinci/davinci_emac.txt
@@ -0,0 +1,43 @@
+* Texas Instruments Davinci EMAC
+
+This file provides information, what the device node
+for the davinci_emac interface contain.
+
+Required properties:
+- compatible: "ti,davinci-dm6460-emac";
+- reg: Offset and length of the register set for the device
+- ti,davinci-ctrl-reg-offset: offset to control register
+- ti,davinci-ctrl-mod-reg-offset: offset to control module register
+- ti,davinci-ctrl-ram-offset: offset to control module ram
+- ti,davinci-ctrl-ram-size: size of control module ram
+- ti,davinci-rmii-en: use RMII
+- ti,davinci-no-bd-ram: has the emac controller BD RAM
+- phy-handle: Contains a phandle to an Ethernet PHY.
+ if not, davinci_emac driver defaults to 100/FULL
+- interrupts: interrupt mapping for the davinci emac interrupts sources:
+ 4 sources: <Receive Threshold Interrupt
+ Receive Interrupt
+ Transmit Interrupt
+ Miscellaneous Interrupt>
+- pinmux-handle: Contains a handle to configure the pinmux settings.
+
+Optional properties:
+- local-mac-address : 6 bytes, mac address
+
+Example (enbw_cmc board):
+ eth0: emac at 1e20000 {
+ compatible = "ti,davinci-dm6460-emac";
+ reg = <0x220000 0x4000>;
+ ti,davinci-ctrl-reg-offset = <0x3000>;
+ ti,davinci-ctrl-mod-reg-offset = <0x2000>;
+ ti,davinci-ctrl-ram-offset = <0>;
+ ti,davinci-ctrl-ram-size = <0x2000>;
+ local-mac-address = [ 00 00 00 00 00 00 ];
+ interrupts = <33
+ 34
+ 35
+ 36
+ >;
+ interrupt-parent = <&intc>;
+ pinmux-handle = <&emac_pins>;
+ };
diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index 4fa0bcb..56e1c35 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -58,6 +58,12 @@
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/davinci_emac.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_net.h>
+
+#include <mach/mux.h>
#include <asm/irq.h>
#include <asm/page.h>
@@ -339,6 +345,9 @@ struct emac_priv {
u32 rx_addr_type;
atomic_t cur_tx;
const char *phy_id;
+#ifdef CONFIG_OF
+ struct device_node *phy_node;
+#endif
struct phy_device *phydev;
spinlock_t lock;
/*platform specific members*/
@@ -1760,6 +1769,82 @@ static const struct net_device_ops emac_netdev_ops = {
#endif
};
+#ifdef CONFIG_OF
+static struct emac_platform_data
+ *davinci_emac_of_get_pdata(struct platform_device *pdev,
+ struct emac_priv *priv)
+{
+ struct device_node *np;
+ struct device_node *pinmux_np;
+ struct emac_platform_data *pdata = NULL;
+ const u8 *mac_addr;
+ u32 data;
+ int ret;
+ int version;
+
+ np = pdev->dev.of_node;
+ if (!np)
+ goto nodata;
+ else
+ version = EMAC_VERSION_2;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ goto nodata;
+ }
+ pdata->version = version;
+
+ mac_addr = of_get_mac_address(np);
+ if (mac_addr)
+ memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
+
+ ret = of_property_read_u32(np, "ti,davinci-ctrl-reg-offset", &data);
+ if (!ret)
+ pdata->ctrl_reg_offset = data;
+
+ ret = of_property_read_u32(np, "ti,davinci-ctrl-mod-reg-offset",
+ &data);
+ if (!ret)
+ pdata->ctrl_mod_reg_offset = data;
+
+ ret = of_property_read_u32(np, "ti,davinci-ctrl-ram-offset", &data);
+ if (!ret)
+ pdata->ctrl_ram_offset = data;
+
+ ret = of_property_read_u32(np, "ti,davinci-ctrl-ram-size", &data);
+ if (!ret)
+ pdata->ctrl_ram_size = data;
+
+ ret = of_property_read_u32(np, "ti,davinci-rmii-en", &data);
+ if (!ret)
+ pdata->rmii_en = data;
+
+ ret = of_property_read_u32(np, "ti,davinci-no-bd-ram", &data);
+ if (!ret)
+ pdata->no_bd_ram = data;
+
+ priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
+ if (!priv->phy_node)
+ pdata->phy_id = "";
+
+ pinmux_np = of_parse_phandle(np, "pinmux-handle", 0);
+ if (pinmux_np)
+ davinci_cfg_reg_of(pinmux_np);
+
+ pdev->dev.platform_data = pdata;
+nodata:
+ return pdata;
+}
+#else
+static struct emac_platform_data
+ *davinci_emac_of_get_pdata(struct platform_device *pdev,
+ struct emac_priv *priv)
+{
+ return pdev->dev.platform_data;
+}
+#endif
/**
* davinci_emac_probe: EMAC device probe
* @pdev: The DaVinci EMAC device that we are removing
@@ -1803,7 +1888,7 @@ static int __devinit davinci_emac_probe(struct platform_device *pdev)
spin_lock_init(&priv->lock);
- pdata = pdev->dev.platform_data;
+ pdata = davinci_emac_of_get_pdata(pdev, priv);
if (!pdata) {
dev_err(&pdev->dev, "no platform data\n");
rc = -ENODEV;
@@ -2013,6 +2098,12 @@ static const struct dev_pm_ops davinci_emac_pm_ops = {
.resume = davinci_emac_resume,
};
+static const struct of_device_id davinci_emac_of_match[] = {
+ {.compatible = "ti,davinci-dm6460-emac", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, davinci_emac_of_match);
+
/**
* davinci_emac_driver: EMAC platform driver structure
*/
@@ -2021,6 +2112,7 @@ static struct platform_driver davinci_emac_driver = {
.name = "davinci_emac",
.owner = THIS_MODULE,
.pm = &davinci_emac_pm_ops,
+ .of_match_table = of_match_ptr(davinci_emac_of_match),
},
.probe = davinci_emac_probe,
.remove = __devexit_p(davinci_emac_remove),
--
1.7.7.6
More information about the linux-arm-kernel
mailing list